I just ordered 2 bottles after the initial one I tried. It seems to work almost as well as a Tylenol PM, but without it being a drug and without feeling groggy in the morning. Plus, it works way faster because it is liquid. I am comparing it to 1 Tylenol PM, which is what I would take. If you need 2 or something stronger to sleep, then I don't know if this would be enough for you. But inexpensive, so certainly worth the try.